Samsung SM-J710FN/DF User Manual page 18

Basics
– Type 2 (SM-J710F, SM-J710FN):
► Dual SIM models: Insert the SIM or USIM card with the gold-coloured contacts facing
downwards.
Insert the primary SIM or USIM card into SIM card slot 1 (
USIM card into SIM card slot 2 (
– Type 1 (SM-J510F/DS, SM-J510FN/DS, SM-J510FN/DD, SM-J510GN/DS, SM-J510H/
DS):
).
2
18
) and the secondary SIM or
1
2
1